bits.c revision 102644 
1/*
2 * Copyright (c) 1997-2002 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifdef HAVE_CONFIG_H
35#include <config.h>
36RCSID("$Id: bits.c,v 1.22 2002/08/28 16:08:44 joda Exp $");
37#endif
38#include <stdio.h>
39#include <string.h>
40#include <stdlib.h>
41#include <ctype.h>
42
43#define BITSIZE(TYPE)						\
44{								\
45    int b = 0; TYPE x = 1, zero = 0; const char *pre = "u";	\
46    char tmp[128], tmp2[128];					\
47    while(x){ x <<= 1; b++; if(x < zero) pre=""; }		\
48    if(b >= len){						\
49        int tabs;						\
50	sprintf(tmp, "%sint%d_t" , pre, len);			\
51	sprintf(tmp2, "typedef %s %s;", #TYPE, tmp);		\
52	tabs = 5 - strlen(tmp2) / 8;				\
53        fprintf(f, "%s", tmp2);					\
54	while(tabs-- > 0) fprintf(f, "\t");			\
55	fprintf(f, "/* %2d bits */\n", b);			\
56        return;                                                 \
57    }								\
58}
59
60#ifndef HAVE___ATTRIBUTE__
61#define __attribute__(x)
62#endif
63
64static void
65try_signed(FILE *f, int len)  __attribute__ ((unused));
66
67static void
68try_unsigned(FILE *f, int len) __attribute__ ((unused));
69
70static int
71print_bt(FILE *f, int flag) __attribute__ ((unused));
72
73static void
74try_signed(FILE *f, int len)
75{
76    BITSIZE(signed char);
77    BITSIZE(short);
78    BITSIZE(int);
79    BITSIZE(long);
80#ifdef HAVE_LONG_LONG
81    BITSIZE(long long);
82#endif
83    fprintf(f, "/* There is no %d bit type */\n", len);
84}
85
86static void
87try_unsigned(FILE *f, int len)
88{
89    BITSIZE(unsigned char);
90    BITSIZE(unsigned short);
91    BITSIZE(unsigned int);
92    BITSIZE(unsigned long);
93#ifdef HAVE_LONG_LONG
94    BITSIZE(unsigned long long);
95#endif
96    fprintf(f, "/* There is no %d bit type */\n", len);
97}
98
99static int
100print_bt(FILE *f, int flag)
101{
102    if(flag == 0){
103	fprintf(f, "/* For compatibility with various type definitions */\n");
104	fprintf(f, "#ifndef __BIT_TYPES_DEFINED__\n");
105	fprintf(f, "#define __BIT_TYPES_DEFINED__\n");
106	fprintf(f, "\n");
107    }
108    return 1;
109}
110
111int main(int argc, char **argv)
112{
113    FILE *f;
114    int flag;
115    char *fn, *hb;
116
117    if(argc < 2){
118	fn = "bits.h";
119	hb = "__BITS_H__";
120	f = stdout;
121    } else {
122	char *p;
123	fn = argv[1];
124	hb = malloc(strlen(fn) + 5);
125	sprintf(hb, "__%s__", fn);
126	for(p = hb; *p; p++){
127	    if(!isalnum((unsigned char)*p))
128		*p = '_';
129	}
130	f = fopen(argv[1], "w");
131    }
132    fprintf(f, "/* %s -- this file was generated for %s by\n", fn, HOST);
133    fprintf(f, "   %*s    %s */\n\n", (int)strlen(fn), "",
134	    "$Id: bits.c,v 1.22 2002/08/28 16:08:44 joda Exp $");
135    fprintf(f, "#ifndef %s\n", hb);
136    fprintf(f, "#define %s\n", hb);
137    fprintf(f, "\n");
138#ifdef HAVE_INTTYPES_H
139    fprintf(f, "#include <inttypes.h>\n");
140#endif
141#ifdef HAVE_SYS_TYPES_H
142    fprintf(f, "#include <sys/types.h>\n");
143#endif
144#ifdef HAVE_SYS_BITYPES_H
145    fprintf(f, "#include <sys/bitypes.h>\n");
146#endif
147#ifdef HAVE_BIND_BITYPES_H
148    fprintf(f, "#include <bind/bitypes.h>\n");
149#endif
150#ifdef HAVE_NETINET_IN6_MACHTYPES_H
151    fprintf(f, "#include <netinet/in6_machtypes.h>\n");
152#endif
153#ifdef HAVE_SOCKLEN_T
154    fprintf(f, "#include <sys/socket.h>\n");
155#endif
156    fprintf(f, "\n");
157
158    flag = 0;
159#ifndef HAVE_INT8_T
160    flag = print_bt(f, flag);
161    try_signed (f, 8);
162#endif /* HAVE_INT8_T */
163#ifndef HAVE_INT16_T
164    flag = print_bt(f, flag);
165    try_signed (f, 16);
166#endif /* HAVE_INT16_T */
167#ifndef HAVE_INT32_T
168    flag = print_bt(f, flag);
169    try_signed (f, 32);
170#endif /* HAVE_INT32_T */
171#if 0
172#ifndef HAVE_INT64_T
173    flag = print_bt(f, flag);
174    try_signed (f, 64);
175#endif /* HAVE_INT64_T */
176#endif
177
178#ifndef HAVE_UINT8_T
179    flag = print_bt(f, flag);
180    try_unsigned (f, 8);
181#endif /* HAVE_UINT8_T */
182#ifndef HAVE_UINT16_T
183    flag = print_bt(f, flag);
184    try_unsigned (f, 16);
185#endif /* HAVE_UINT16_T */
186#ifndef HAVE_UINT32_T
187    flag = print_bt(f, flag);
188    try_unsigned (f, 32);
189#endif /* HAVE_UINT32_T */
190#if 0
191#ifndef HAVE_UINT64_T
192    flag = print_bt(f, flag);
193    try_unsigned (f, 64);
194#endif /* HAVE_UINT64_T */
195#endif
196
197#define X(S) fprintf(f, "typedef uint" #S "_t u_int" #S "_t;\n")
198#ifndef HAVE_U_INT8_T
199    flag = print_bt(f, flag);
200    X(8);
201#endif /* HAVE_U_INT8_T */
202#ifndef HAVE_U_INT16_T
203    flag = print_bt(f, flag);
204    X(16);
205#endif /* HAVE_U_INT16_T */
206#ifndef HAVE_U_INT32_T
207    flag = print_bt(f, flag);
208    X(32);
209#endif /* HAVE_U_INT32_T */
210#if 0
211#ifndef HAVE_U_INT64_T
212    flag = print_bt(f, flag);
213    X(64);
214#endif /* HAVE_U_INT64_T */
215#endif
216
217    if(flag){
218	fprintf(f, "\n");
219	fprintf(f, "#endif /* __BIT_TYPES_DEFINED__ */\n\n");
220    }
221#ifdef KRB5
222    fprintf(f, "\n");
223#if defined(HAVE_SOCKLEN_T)
224    fprintf(f, "typedef socklen_t krb5_socklen_t;\n");
225#else
226    fprintf(f, "typedef int krb5_socklen_t;\n");
227#endif
228#if defined(HAVE_SSIZE_T)
229#ifdef HAVE_UNISTD_H
230    fprintf(f, "#include <unistd.h>\n");
231#endif
232    fprintf(f, "typedef ssize_t krb5_ssize_t;\n");
233#else
234    fprintf(f, "typedef int krb5_ssize_t;\n");
235#endif
236    fprintf(f, "\n");
237#endif /* KRB5 */
238    fprintf(f, "#endif /* %s */\n", hb);
239    return 0;
240}
241